Fuel Injector Lifespan??

[ewillis]

My current injectors have over 100K on them and I am considering replacing them. Anyone know about how long they last? Also...found these on CL, good deal for $170??

Set of 6 Custom Remanufactured Toyota Land Cruiser 4.5L Bosch Design III Fuel Injector kit 4 Hole Spray

2 Year Unlimited Replacement Warranty!
High impedance
315cc Bosch Fuel Injector
Each of our injectors are torn down, thoroughly cleaned and rebuilt using the latest in fuel injection test equipment
All new parts (hd filter baskets, Viton O-rings, caps, etc).
Each injector works like new for a fraction of the price
With these Bosch Design III Fuel Injectors you will get maximum fuel efficiency, power, torque and better throttle response
These will be a direct fit for 1993 1994 1995 1996 1997 Toyota 1FZFE Land Cruiser 4.5L 6 cylinder engines
With our adapters its Plug and Play all the way!
Replaces Denso 23250-74080

 

[Timpanogos Slim]

They last a long freakin time. I am certain that there are many with over 300k on them and running fine.

We've discussed those injectors before and determined that the seller has greatly overstated the fitment for our engines, iirc. Like the fuel rail doesn't meet up.

For a lot less money you can take or send your injectors to someone who will clean them, bench test them, repair any injectors which aren't flowing to spec, fit them with new seals.

But at only 100k, meh.

 

[NLXTACY]

~290k on mine until I had them serviced when I did my motor.

 

[ewillis]

They last a long freakin time. I am certain that there are many with over 300k on them and running fine.

We've discussed those injectors before and determined that the seller has greatly overstated the fitment for our engines, iirc. Like the fuel rail doesn't meet up.

For a lot less money you can take or send your injectors to someone who will clean them, bench test them, repair any injectors which aren't flowing to spec, fit them with new seals.

But at only 100k, meh.

Good to know...thanks Slim!

 

[george_tlc]

One of mine died at around 140k... They last until they burn out...

cheers,
george.

 

[1911]

I had the injectors on my 3FE professionally cleaned/serviced/balanced at about 200,000 miles as preventative maintenance while I had the plenum off anyway. All six tested within 3% of new before they even cleaned them. Put them back in and they're still going in that same FJ80 at 300,000 miles.

 

[steffan]

I overhauled everything at 200k - had the injectors sent out and cleaned/ blueprinted: same as above all within 2-3% and well within spec

 

[93yotasr5]

I'm at 300k and I don't think they have ever been replaced

 

[IdahoDoug]

Loooooong time. Don't replace them, have them cleaned and balanced for under 100 bucks. Mr Injector near me has done several sets for me.

 

[Kernal]

Assuming no obvious problems pre-cleaning, what's the average improvement on a set of high mileage injectors after a cleaning?

 

[guzzla]

I had mine cleaned in a sonic bath and the spray pattern tested for spec around the 170,000km mark. Testing showed they were about 10% blocked before cleaning and 100% afterwards. Take that as you will but the car was noticeably smoother and more responsive to drive afterwards.

But they really need to put in a sonic bath to get them clean. I don't believe there is another way even as remotely effective. A sonic bath works much the same way as ultra sound is used to break down kidney stones.

 

[John E Davies]

I think it's foolish to never get them serviced. I suggest 150K mile intervals at most. It is not a bad job and a local shop won't charge much.

An injector with poor pattern or a restriction will not just cause that cylinder to run poorly. If one runs lean, the O2 sensor will tell the others to run richer to compensate, since it's reading downstream is an average of all cylinders. That is why you ofter see older engines start to get poorer economy - they are running richer than optimum.

Even if you pull yours and they are fine, you will feel lots better knowing that they are performing as engineered, and you can blame your crappy fuel economy on those big mud tahrs or all that heavy steel armor....

John Davies
Spokane WA USA

 

[FloridaCruiser813]

So where is everyone sending their injectors to be serviced ?

 

[Godwin]

I had the last set done at Witchhunter WitchHunter Performance - Injector Cleaning & Flow Testing Services.

 

[FloridaCruiser813]

@Godwin thank you for the fast reply

 

[cme4lyt]

WhitchHunter has done two sets for me, they're awesome !!

 

[98 SNAKE EATER]

405, xxx miles on mine when I pulled the head to do a valvejob.

Just gave them a shot of cleaner and replaced the seals

 

[math]

Like @george_tlc we had our #6 injector burn out, ours was at 200k.

 

[Dave 2000]

Still have originals, approaching 1/4 of a million miles (sounded more than 244,000)

regards

Dave

 

[george_tlc]

Still have originals, approaching 1/4 of a million miles (sounded more than 244,000)

regards

Dave

Your stinking diesel injectors are not part of this discussion

cheers,
george.